Mackie HR624 MK2 The Cabinet, Power Amplifiers

HR624 MK2

The Cabinet...

The cabinet is made of MDF with a high-gloss piano- black finish. Internal bracing increases the strength and rigidity (stiffness) of the box. An open-cell adiabatic foam material fills the inside of the box to absorb internal reflections and dampen standing waves. Mounting hardware is installed on the bottom of the cabinet that fits the WB-60 OmniMount wall-mount bracket.

Power Amplifiers...

The low-frequency amplifier produces up to 100 watts continuous before clipping, while the high-frequency amplifier produces up to 40 watts continuous.

QUICK START

We realize that you can’t wait to hook up your new Mackie HR624 MK2 High

Resolution Studio Monitors and try

them out. Nevertheless, please take the time to read this page NOW, and the rest can wait until you’re good and ready.

Make sure the Voltage Selector

Switch [11] on the bottom of the

cabinet is set to the correct voltage setting for your AC Mains supply.

Each of the HR624 MK2 cabinets has its own built-in power amplifiers. That’s right, two amplifiers per speaker cabinet; one for the high-frequency tweeter and one for the low-frequency woofer. You should turn the INPUT SENSITIVITY [2] control on the back of the cabinet down (fully counterclockwise) before turning on the Studio Monitors for the first time. Also be sure to set the power switch [9] on the front panel to its standby position (out). This will prevent you from accidentally connecting a hot signal source to the monitors and getting a rude surprise.

There are a number of other settings you can make on the back of the HR624 MK2, and you can look at the graphic instructions relating to each of them on the back of the cabinet (or wait until you read about them later on in this manual so you really know what they do). For now, just leave them at the factory default settings (ACOUSTIC SPACE = WHOLE; LOW FREQ = 49Hz; HIGH FREQ = 0), except for the POWER MODE [6] switch. Be sure it is set to the STANDBY position.

1.Connect the line-level monitor signal from your mixer, preamp, or other signal source to the SIGNAL INPUT

[1]jack on the HR624 MK2 Studio Monitor (1⁄4-inch PHONE, XLR, or RCA).

2.Connect the supplied AC power cord to the IEC socket

[7]on the back of the monitor. Plug the other end into an AC outlet properly configured with the voltage corresponding to the Voltage Selector Switch [11] setting.

3.Set the POWER MODE [6] switch on the rear panel to the ON position. With the front panel power switch [9] out, the power amplifier is in Standby mode.

4.Start your signal source (tape deck, CD, DAW, or whatever), but leave the master volume control on your mixer or preamp down.

5.Push in the power switch [9] on the front of the HR624 MK2. The power ring [10] around the switch will illuminate.

6.Slowly turn up the INPUT SENSITIVITY [2] control on the back of the monitor to its fully clockwise position (NORMAL).

7.Adjust the master volume on your mixer to a comfortably loud listening level. Enjoy the silky smooth highs and authoritative, commanding lows of the HR624 MK2. Then read the rest of this manual.

AN EXTREMELY IMPORTANT NOTE ON HR624 MK2 BASS RESPONSE AND YOUR CONTROL ROOM.

		Your new HR624 MK2s achieve their
		Your new HR624 MK2s achieve their
		best bass response	in a room that’s
		optimized for bass reproduction		. A
		lot of factors can conspire to thwart
		the HR624 MK2s’ extended low
frequency — including room shape, room volume and
acoustical	treatment.

This is not a cop-out or an apology. It’s plain old physics in action. Luckily we’ve armed you with some compensating controls that you can use to optimize the frequency response of the speakers in your particular room. Consider the following:

The ACOUSTIC SPACE switch must be set correctly.

When you put your HR624 MK2s in a corner or up against walls, their bass characteristics change. Adjust the ACOUSTIC SPACE [3] switch setting accordingly to avoid muddy or exaggerated low frequency response.

HR624 MK2